internal unsafe void ClearCache()
{
// Tell the driver to search for any new SSIDs
// and return them on the next OID_802_11_BSSID_LIST
// message.
uint dwBytesReturned = 0;
NDISUIO_QUERY_OID queryOID = new NDISUIO_QUERY_OID(0);
IntPtr ndisAccess;
bool retval;
// Attach to NDISUIO.
ndisAccess = FileEx.CreateFile(
NDISUIOPInvokes.NDISUIO_DEVICE_NAME,
FileAccess.All,
FileShare.None,
FileCreateDisposition.OpenExisting,
NDISUIOPInvokes.FILE_ATTRIBUTE_NORMAL | NDISUIOPInvokes.FILE_FLAG_OVERLAPPED);
if ((int)ndisAccess == FileEx.InvalidHandle)
{
// The operation failed. Leave us empty.
return;
}
// Send message to driver.
byte[] namestr = System.Text.Encoding.Unicode.GetBytes(adapter.Name + '\0');
fixed(byte *name = &namestr[0])
{
// Get Signal strength
queryOID.ptcDeviceName = name;
queryOID.Oid = NDISUIOPInvokes.OID_802_11_BSSID_LIST_SCAN; // 0x0D01011A
retval = NDISUIOPInvokes.DeviceIoControl(ndisAccess,
NDISUIOPInvokes.IOCTL_NDISUIO_SET_OID_VALUE, // 0x120814
queryOID,
queryOID.Size,
queryOID,
queryOID.Size,
ref dwBytesReturned,
IntPtr.Zero);
}
if (retval)
{
// The call went fine. There is no return
// data.
}
else
{
// There was an error.
int err = MarshalEx.GetLastWin32Error();
// ToDo: Additional error processing.
}
queryOID = null;
FileEx.CloseHandle(ndisAccess);
}
public WinAPIException(string Message) : base(Message + " " + GetErrorMessage(MarshalEx.GetLastWin32Error()))
{
this.win32Error = MarshalEx.GetLastWin32Error();
}